A novel anthracene-scaffolded triazine-based porous organic polymer for efficient capture of iodine in gaseous and liquid phases

The uncontrolled release of gaseous iodine species (I 2 , organic iodides) under nuclear accident conditions is increasingly causing severe regional ecological disasters, creating an urgent need for the development of highly efficient iodine adsorbents for nuclear waste treatment. In this study, we designed and synthesized an anthracene-scaffolded triazine-based porous organic polymer (POP-W) via Friedel-Crafts alkylation reaction. This polymer exhibits a straightforward synthesis, outstanding environmental stability, and distinctive pore structure characteristics. Nitrogen sorption characterization revealed that POP-W possesses mesoporous characteristics, exhibiting a Brunauer-Emmett-Teller (BET) specific surface area of 307.96 m 2  g −1 , a total pore volume of 0.174 cm 3  g −1 , and a Barrett-Joyner-Halenda (BJH) adsorption average pore diameter of 2.95 nm. In iodine vapor adsorption tests at 75 °C, POP-W achieved a maximum uptake capacity of 4.29 g g −1 . Furthermore, Langmuir model fitting indicated a Theoretical maximum adsorption capacity of 509.47 mg g −1 for iodine in n-hexane solution. The outstanding performance of POP-W demonstrates significant potential for application in the immobilizati0on and recovery of radioactive iodine isotopes (e.g., 129 I, 131 I) from nuclear waste streams.